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# Principal Firmware Engineer

- **Company:** ECM Selection Limited
- **Location:** Cambridge, UK
- **Experience:** Expert
- **Salary:** £75,000.0
- **Contract:** Permanent contract
- **Skills:** C Sharp (Programming Language), Firmware, Python (Programming Language), Application Specific Integrated Circuits, Bare Metal
- **Published:** August 24, 2026
- **Apply:** https://www.ecmselection.co.uk/register/27311

## About the Role

Developing embedded firmware for ARM-based microcontrollers

An excellent opportunity for a skilled firmware developer to make an impact on a growing Cambridge company.

Working with ARM-based microcontrollers, your expertise in embedded software engineering will be crucial to expand the capability of the group and support the evolution of their sensor technology.

Together with colleagues in hardware design and data science, you would be working on firmware for applications, incorporating new features for low level test data, and the implementation, characterisation and analysis of new algorithms. You will be used to working to an ISO9001 framework and ideally you will also have experience with medical or automotive industry standards such as IEC 62304 and ISO26262.

Skills and experience you will need:

 * A good engineering or scientific degree from a well-respected university
 * Experience with developing bare metal, real-time firmware in C for ASICS or ARM-based microcontrollers such as STM32 and EFM32, and using tools such as: Keil, IAR, STM32CubeMX and Eclipse/gnu
 * Source code management systems such as Git and Perforce
 * Familiar with automated testing of firmware builds, as well as regression testing
 * Debugging using JTAG interface adapters and testing using oscilloscopes and logic analysers
 * Python

Other advantageous skills include:

 * Development of Windows GUI applications in C#
 * Experience with Continuous Integration (CI) systems
 * Experience of digital or analogue hardware design

You will also need full rights to work in the UK without time limit or sponsorship.

## Description

Keywords: Firmware, Cambridge, ARM microcontrollers, STM32, EFM32, Python, C#, Principal, Senior, Bare Metal, Embedded, C, ASIC


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